Wooden column.



UNTED STATS t. E FFC.

CHARLES A. NICKERSON, OF KNOXVILLE, TENNESSEE.

WOODEN COLUMN.

Specification of Letters Patent.

To all whom it may concern:

Be it known that- I, CHARLES A. Nrcxnnson, a citizen of the UnitedStates, residing at Knoxville, in the county of Knox and State ofTennessee, have invented a new and useful improvement in Wooden Columns,of which the following is a specification, reference being had to theaccompanying drawmg.

My improvement relates particularly to wooden columns formed oflongitudinal .inter-engaging sections.

The object of the invention is to provide a column in which the jointsbetween the inter-engaging sections are of superior efficiency.

In the accompanying drawings, Figure l is a sectional side elevation ofa portion of a column embodying my improvement; Fig. 2 is a transversesection on the line 2-2 of Fig. l; Fig. 3 is a detail transversesectional view showing one of the joints by which the sections or stavesof the column are interengaged.

Referring to said drawings, longitudinal sect-ions or staves of whichthe column is formed. Each of said staves has at its left hand side, asviewed in Figs. 2 and 3, an outer face, l, which is approximately radialto the axis of the column and an inner face, 2, which is alsoapproximately radial to the axis of the column but off-set from theface, l. From the outer portion of the face, 2, a face, 3, extends awayfrom the face, 2, approximately perpendicular to the lat-ter. Betweenthe faces, l and 3, is an oblique dove-tail, A, which is approximatelyon a line or plane bisecting the angle which would be formed byextending the faces, l and 3, until they meet or intersect and whichdove-tail is at the same time at an angle of about forty-five degrees toa plane which is radial to the column axis and cuts the dovetail. And inthe form shown in the drawings, said dove-tail hasin its outer portion aV-shape groove, 5. The right hand edge of each of said sections orstaves is shaped to conform, in reverse, to the left hand edge of eachof said sections, faces, G, 7, and 8, on said left hand edge -beingadapted, respectively, to meet the faces, l, 2, and 3, on anothersection, and a groove, 9, in said right hand edge being adapted toreceive the dovetail, 4;, of another section. The sections or staves canbe inter-engaged only by pushing A, A are the ,one endwise upon theother after entering the dove-tail, 4, into the groove, 9. In thismanner one piece after another is forced into position until the columnhas been completed.

By forming the groove, 5, in the dove-tail, Ll, the area of engagementis increased and additional faces are provided to overcome tendencytoward turning or lateral movement. By thus forming said dove-tail andplacing it in the manner described, a very effective and lasting jointis formed.

I claim as my invention:

l. A column composed of inter-engaging, longitudinal sections, eachsection having on one edge a dove-tail which is oblique to a plane whichis radial to the column axis and cuts the dove-tail and the other edgehaving a groove conforming in reverse to said dovetail, substantially asdescribed.

2. A column composed of inter-engaging, longitudinal sections, eachsection having on one edge a grooved dove-tail which is oblique to aplane which is radial to the column axis and cuts the dove-tail and theother edge having a groove conforming in reverse to said dove-tail,substantially as described.

A column composed of inter-engaging, longitiidinal sections having onone edge a face approximately radial to the column axis and having onsaid edge another face at an angle to the first mentioned face andhaving a dove-tail between said. faces, and having on its other edge twofaces and a groove conforming in reverse to the faces and dove-tail ofthe other edge, substantially as described.

A. A column composed of inter-engaging, longitudinal sections having onone edge a face approximately radial to the column axis and having onsaid edge another face at an angle to the first mentioned face andhaving a grooved dove-tail between said faces, and having on its otheredge two faces and a groove conforming in reverse to the faces anddove-tail of the other edge, substantially as described.

ln testimony whereof I have signed my n ame, in presence of twowitnesses, this 15th day of October, in the year one thousand ninehundred and eight.

CHARLES A. NICKERSON.

l/Vitnesses WVM. Mitrnnrroni, CYRUs KEI-m.

Patented Sept. 14, 1909.l

